The most exciting road trip in history begins! In this action-packed, New York Times bestselling adventure, twelve-year-old twins Coke and Pepsi McDonald embark on a family vacation you'll have to read to believe.

Coke McDonald and his twin sister, Pepsi, think their family's cross-country RV vacation is nothing to get excited about...until they're chased off a cliff, locked in a burning school, and receive mysterious messages in codes and ciphers. From California to Wisconsin, it's a race against time to find out who's after Coke and Pep, who's leaving the notes...and just what being a part of The Genius Files entails!

With the real-kid humor that has earned Dan Gutman millions of fans around the world, and featuring weird-but-true American tourist destinations, The Genius Files is a one-of-a-kind mix of geography and fun.

As Coke and Pep dodge nefarious villains from the Pez museum in California all the way to the Infinity Room in Wisconsin, black-and-white photographs and maps put young readers right into the action.

And don't miss the next leg of the journey in The Genius Files: Never Say Genius!

Dan Gutman is the New York Times bestselling author of the Genius Files series; the Baseball Card Adventure series, which has sold more than 1.5 million copies around the world; and the My Weird School series, which has sold more than 36 million copies. Thanks to his many fans who voted in their classrooms, Dan has received nineteen state book awards and ninety-two state book award nominations. He lives in New York City with his wife. You can visit him online at dangutman.com.